Room for improvement?

[NY2KW]

My Wave 150i mount has been guiding my RC 71 WIFD with an ASI120MM mini fairly well. On nights with no significant wind I usually see total rms error ~0.7.  I have run Guiding Asst  a few times. Is there room for improvement by further adjustment of any parameters? As its a wide-field scope, star elongation isn't that noticeable.

Thanks in advance.

Jerry

https://openphdguiding.org/logs/dl/PHD2_logs_Ppe6.zip

[Bruce Waddington]

This looks pretty good.  I think you should try using the PPEC algorithm for RA to reduce the residual periodic error:

In the algorithms tab in Advanced Settings, choose PPEC for RA, then set the period length to 286 and un-check the box for 'Auto-adjust period'.  

I notice you're re-using a calibration from June, is this a permanent set-up?

Regards,

Bruce

[Jerry Stern]

HI Bruce,

 

Yes, It’s on a permanent pier at StarFront in Texas. I’ve had more clear nights imaging there in the last 4 weeks than the entire past 12 months at home in NY.  Will switch to PPEC @ 286

 

Thanks again

 

BR

Jerry

 

From: open-phd...@googlegroups.com <open-phd...@googlegroups.com> On Behalf Of Bruce Waddington
Sent: Saturday, August 1, 2026 4:53 PM
To: Open PHD Guiding <open-phd...@googlegroups.com>
Subject: [open-phd-guiding] Re: Room for improvement?

 

This looks pretty good.  I think you should try using the PPEC algorithm for RA to reduce the residual periodic error:

 

 

In the algorithms tab in Advanced Settings, choose PPEC for RA, then set the period length to 286 and un-check the box for 'Auto-adjust period'.  

 

I notice you're re-using a calibration from June, is this a permanent set-up?

 

Regards,

Bruce

 

On Saturday, August 1, 2026 at 1:06:13 PM UTC-7 NY2KW wrote:

My Wave 150i mount has been guiding my RC 71 WIFD with an ASI120MM mini fairly well. On nights with no significant wind I usually see total rms error ~0.7.  I have run Guiding Asst  a few times. Is there room for improvement by further adjustment of any parameters? As its a wide-field scope, star elongation isn't that noticeable.

 

Thanks in advance.

 

Jerry

 

 

https://openphdguiding.org/logs/dl/PHD2_logs_Ppe6.zip

 

 

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